Ever wanted to try your hand at hydroponics? All you need to get started are some gallon-sized plastic bottles, some small plastic cups, and vegetable seeds.

It starts with good intentions and a yogurt tub--or maybe a takeout container. Either way, it's a perfectly decent vessel. So, why not give it a second life as a tomato nursery? It feels eco-savvy.

From small beginnings fitting out farm sheds, Antrim-based family business Brett Martin has unobtrusively become a world leader in plastic sheeting products, turning over sales of more than £220 ...